Boots that rise to the knee and were originally made of leather, can be made of a synthetic rubber that exhibits good chemical stability, and is produced by the polymerization of what? 
chloroprene
-1
Section::::Abstract.
Knee-high boot
1726988
-1
Section::::Abstract.
Knee-high boot
1726988
-1
Section::::Abstract.
Neoprene
217524
-1
Section::::Abstract.
Neoprene
217524